单选题 The challenge of the school is______.

A、 how to teach the students to swim well
B、 how to make the students more active in their learning
C、 to complete "the relationship-building" ahead of time
D、 to urge the teachers to go to the office more often

【正确答案】 B

【答案解析】第三段说，该校最大的挑战是如何确保学生不放任自流，提高结业率。